Harris



CLARK & HARRIS.

Stove Fire Door.

No.v40.326. Patented Oct. 20, 1863.

UNITED STATES PATENT OFFICE.

JOHN S. CLARK AND WASHINGTON HARRIS, OF PHILADELPHIA, PA.

IMPROVEMENT IN FIRE-DOORS FOR STOVES.

Specification forming part of Letters Patent No. 10,326, dated October20, 1863.

.To all whom it may concern.-

Be it known that we, JOHN S. CLARK and WASHINGTON HARRIS, of the city ofPhiladelphia, in the State of Pennsylvania, have invented a new anduseful Improvement in the Fire-Doors of Stoves; and we do hereby declarethat the following is a full, clear, and exact description of theconstruction and op eration of the same, reference being had to theaccompanying drawings, making a part of this specification, in whiehFigure l is a front view, and Fig. 2 a central vertical section, of astove door having our said improvement applied thereto, like letters ofreference indicating the same parts when in both figures.

The object of our invention is to enable the attendant or operator toreadily protect the mica or transparent portions of the feed or firedoor of a stove from becoming obscured or blackened by the smoke or sootwhich is generated in starting or kindling a fire in the stove.

It consists, substantially as hereinafter described and specified, in soapplying and securing the mica sheet or sheets, which are in general usefor producing the transparent portions of the feed or fire doors ofstoves, that the same may be readily covered or protected from theaccess of the smoke or soot which arises from the fire at the pleasureof the attendant or operator without opening the said door.

In the drawings, A is the door, and B the mica applied thereto. In thepresent instance the door A is made in the ordinary form, with fouropenings around its center. The central portions, containing theopenings, are depressed, so as to receive a circular disk, 0, which alsohas four openings, and a secondary disk, d, having correspondingopenings, riveted to the inner side of the same, so that their saidopenings shall be opposite to each other, respectively, and so, also, asto leave a thin space between the two disks 0 d for the introduction ofthe mica B.

The inner disk, d, is also provided with a central stem or journal, 6,which passes through a corresponding hole in the main body of the doorA, and is there secured by a pin, f, so that the disks 0 and d,containing the mica B, may be turned to the right and left alternatelysufliciently far to bring the transparent portions either directlyopposite the openings in the main portion of the door A or directlybehind the solid portions which are between the said openings,substantially as represented in the drawings.

A small projection, g, is cast on the rim of the outer disk, 0, whichserves as a handle for giving motion to the disk, and on the inner sideof the rim of the inner disk, d, there is also a small projection, It,which traverses a short concentric groove, 1 in the depressed portion ofthe main portion of the door, the two together operating as a stop tolimit the motions of the disk.

It will be readily seen that an attendant can at any time protect themica B from becoming obscured or blackened by the smoke or soot withoutopening the door by simply turning the disk 0 so as to bring the mica ortransparent portions of the same behind the solid or closed portions ofthe main part of the door, and that an opposite movement of the diskwill restore the transparent condition of the door.

We wish it to be understood that we do not intend to confine ourinvention to the particular mode described of constructing the same, asit is obvious that the mica may be arranged so as to remain stationary,while an inner disk may be made to cover and uncover it, as oocasion mayrequire, to produce the same result, and that a square slide may bearranged so as to operate to protect the mica in the same manner; but

Having fully described our improvement and shown what we believed to bethe best mode of carrying it out in practice, what we claim as newtherein of our invention, and desire to secure by Letters Patent, is'

The arrangement of the mica in the fire or feed door of a stove providedwith a movable disk or slide and suitable openings, so that the saidmica can be either covered or exposed, as occasion may require, Withoutopening the said door, substantially as described, for the purposespecified.

JOHN S. CLARK. WASHINGTON HARRIS. Witnesses BENJ. Monrson, B. F.SHATTUOK.

